I asked my former F-111 pilot buiddy why he sold his 'Vette. Told me that once he'd done mach speed a couple of hundred feet off a desert floor, cars weren't exciting anymore. He hated aging out of the air guard...
Okay, back to cars. Maybe too new for you...but less than 7,000 '08-'09 Bullitt Mustangs sold. Want really rare? '09's with 629 in green, only 181 in Black.
Every now & then somebody posts a very low miles '08-'09 for sale on the Bullitt board...fools who bought new thinking they'd be sure fire collectables in a decade or so.
$20K will get a nice one...but they don't show up often.
(edit) Lots of wisdom in Seahawk's post..especially when it comes to kids.